Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 2, Problem 39RQ
Explanation of Solution
a.
Conversion of power supply:
- Generally, the processor section, memory section and an I/O module requires a DC voltage of 5VDC.
- When these sections of modules are plugged int...
Explanation of Solution
b.
Hold-up time:
- When the power is dismissed suddenly, it can cause damage to PLC or sometimes, it can even completely hold the process control operation abruptly.
- To avoid this situation, PLC must be able to hold up the time...
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Chapter 2 Solutions
Programmable Logic Controllers
Ch. 2 - Prob. 1RQCh. 2 - What is the function of a PLC output interface...Ch. 2 - Prob. 3RQCh. 2 - Prob. 4RQCh. 2 - Prob. 5RQCh. 2 - Prob. 6RQCh. 2 - Prob. 7RQCh. 2 - Prob. 8RQCh. 2 - Prob. 9RQCh. 2 - Prob. 10RQ
Ch. 2 - Prob. 11RQCh. 2 - What are the advantage and the disadvantage of...Ch. 2 - With reference to PLC discrete input modules: a....Ch. 2 - Prob. 14RQCh. 2 - Explain the function of the backplane of a PLC...Ch. 2 - Prob. 16RQCh. 2 - Prob. 17RQCh. 2 - Prob. 18RQCh. 2 - What electronic element can be used as the...Ch. 2 - With reference to discrete output module current...Ch. 2 - What electronic element can be used as the...Ch. 2 - Prob. 22RQCh. 2 - Prob. 23RQCh. 2 - Prob. 24RQCh. 2 - Prob. 25RQCh. 2 - Prob. 26RQCh. 2 - Prob. 27RQCh. 2 - Prob. 28RQCh. 2 - Prob. 29RQCh. 2 - Explain the difference between a unipolar and...Ch. 2 - Prob. 31RQCh. 2 - In what two ways can the loop power for current...Ch. 2 - Prob. 33RQCh. 2 - Prob. 34RQCh. 2 - Prob. 35RQCh. 2 - Write a short explanation for each of the...Ch. 2 - Write a short explanation for each of the...Ch. 2 - Prob. 38RQCh. 2 - Prob. 39RQCh. 2 - Prob. 40RQCh. 2 - Prob. 41RQCh. 2 - Prob. 42RQCh. 2 - Prob. 43RQCh. 2 - Prob. 44RQCh. 2 - Prob. 45RQCh. 2 - Prob. 46RQCh. 2 - Prob. 47RQCh. 2 - What information is normally stored in the ROM...Ch. 2 - Prob. 49RQCh. 2 - Prob. 50RQCh. 2 - Prob. 51RQCh. 2 - Prob. 52RQCh. 2 - Prob. 53RQCh. 2 - Prob. 54RQCh. 2 - Prob. 55RQCh. 2 - Prob. 56RQCh. 2 - Prob. 57RQCh. 2 - Prob. 58RQCh. 2 - Prob. 59RQCh. 2 - Prob. 60RQCh. 2 - What is the function of a transducer?Ch. 2 - Prob. 62RQCh. 2 - Prob. 1PCh. 2 - Assume a thermocouple, which supplies the input to...Ch. 2 - With reference to I/O module specifications: a. If...Ch. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Prob. 6P
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Similar questions
- 1- Write a PLC ladder program to implement the process illustrated in Figure. 2- Indicate all the input and output field devices in their un-actuated conditions with symbolic addresses. The sequence of operation requires that: Normally open start push button and normally closed stop push button station is used to start and stop the process. When the process starts, the tank is empty and solenoid A energizes to start filling the tank with liquid. As the tank fills, the Empty sensor switch closes. When the tank is half full, the Mid-full level sensor switch closes and the motor starts running to mix the liquid. When the tank is full, the Full level sensor switch closes momentarily so that: a- The motor stops. b- Solenoid A is de-energized. c- Solenoid B is energized to empty the tank. When the tank is completely empty, the Empty sensor switch opens to de-energize solenoid B. The start button is pressed to repeat the sequence. SOL A Motor Full level sensor switch Mid-Full level sensor…arrow_forward1- Write a PLC ladder program to implement the process illustrated in Figure. 2- Indicate all the input and output field devices in their un-actuated conditions with symbolic addresses. The sequence of operation requires that: Normally open start push button and normally closed stop push button station is used to start and stop the process. When the process starts, the tank is empty and solenoid A energizes to start filling the tank with liquid. As the tank fills, the Empty sensor switch closes. When the tank is half full, the Mid-full level sensor switch closes and the motor starts running to mix the liquid. When the tank is full, the Full level sensor switch closes momentarily so that: a- The motor stops. b- Solenoid A is de-energized. c- Solenoid B is energized to empty the tank. When the tank is completely empty, the Empty sensor switch opens to de-energize solenoid B. The start button is pressed to repeat the sequence. SOL A Motor Full level sensor switch Mid-Full level sensor…arrow_forward1- Write a PLC ladder program to implement the process illustrated in Figure. 2- Indicate all the input and output field devices in their un-actuated conditions with symbolic addresses. The sequence of operation requires that: A start/stop pushbutton station is used to start and When the process starts, the tank is empty and solenoid A energizes to start filling the tank with liquid. As the tank fills, the Empty sensor switch closes. When the tank is half full, the Mid-full level sensor switch closes and the motor starts running to mix the liquid. When the tank is full, the Full level sensor switch closes momentarily so that: stop the process. a- The motor stops. b- Solenoid A is de-energized. c- Solenoid B is energized to empty the tank. When the tank is completely empty, the Empty sensor switch opens to de-energize solenoid B. The start button is pressed to repeat the sequence. out Puts SOL A oulput Motor Infut Full level sensor switch Mid-Full level Empty sensor sensor switch switch…arrow_forward
- Explain the general structure of programmable controllers (PLC) by drawing figures. Write the names of the control elements to be connected to the input and output parts of the PLC. (Please type with keyboard so that I can understand.Thanks)arrow_forwardDesign a PLC program and prepare a typical I/O connection diagram and ladder logic program for the following motor control specifications: • Three starters are to be wired so that each starter is operated from its own start/stop pushbutton station. • A master stop station is to be included that will trip out all starters when pushed.arrow_forward5. The most common type of I/O interface module in PLC is the discrete type, such as A. Thermocouples, strain gages, or pressure sensors B. Selector switches, pushbuttons, and limit switches C. servomotors, stepping motors PID loops, and decoder inputs D. multiplexed displays, and keyboardsarrow_forward
- What is considered as a proper grounding system? a. None of the choices O b. All of the choices OC. Provides a high impedance path to earth ground O d. The complete PLC installation are all connected to a single low impedance ground e. The grounding path must be soldered to the PLC installationarrow_forwardA traffic light PLC program working with a screen will be installed. We will enter and adjust the intervals on the screen. (Red, green and yellow light flashing times). Put the every step's picture please.arrow_forwardA PLC is used to control a single-axis robot, in which the axis is driven by a pneumatic cylinder. An output signal to the pneumatic cylinder causes it to extend (ON state). When there is no signal, the pneumatic cylinder retracts (OFF state). The gripper is an also driven by a pneumatic cylinder. The gripper open position is an OFF state and the closed position is an ON state. In order to perform a task, the following sequence of operations must be performed: TH Sequence No. Аxis Gripper OFF OFF 1 ON OFF ON ON 3 OFF ON 4 OFF OFF The process begins when the start bush button is ON and a part triggers a limit switch. For safety, an emergency switch is used to shut off the entire system. Design a PLC ladder diagram for this application.arrow_forward
- 1. Briefly describe the difference between the different types of counter modules used for PLCs. 2. Design a ladder logic program for a traffic light intersection. Use timers to control the duration of the green, yellow, and red lights for each direction.arrow_forward3. In modular PLC I/O is divided into compartments which separated modules can be plugged to A. Decrease the error ratio B. Decrease the cost C. Increase the efficiency D. Increase the flexibility of operationarrow_forwardDescribe the sequence of timing signals of 8155 programmable devices when it reads or writes to an I/O port in handshake mode. Also determine the states of status word, control word. What will be the control word for 8155 timer?arrow_forward
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